"Our alarm systems are installed all over Europe. For this, we need a solution that also offers reception everywhere. That's exactly what we found with wherever SIM ."

Claus-Dieter Büttner

Managing Director C.D. Büttner Sicherheitstechnik GmbH

C. D. Büttner Safety Engineering

M2M SIMs in alarm and security systems

C.D. Büttner Sicherheitstechnik GmbH has been one of the best-known security companies in Germany for more than 30 years. The product portfolio includes innovative and reliable solutions for the protection of property and life for private and business customers, for example alarm systems or emergency call centres. In its installed systems, Büttner relies on the M2M SIM cards from wherever SIM.

Battery as a Service: From vision to implementation

New pipelines: A costly additional expense

"Our job is not only to install an alarm system. We are also responsible for maintaining a stable and secure connection to these complex systems in order to be immediately informed about incidents in case of emergency. After all, that is the purpose and task of such a system," says Claus-Dieter Büttner, Managing Director of C.D. Büttner Sicherheitstechnik GmbH.

"Unfortunately, this was not always easy," Büttner continues. "In new buildings made of reinforced concrete, for example, reception can be limited. Especially if you only use SIM cards from one mobile phone provider, as we did before we discovered wherever SIM .

If this one big provider didn't have a network in one place, it became complicated and exhausting for us. In that case, we could only ensure the connection for our systems via newly laid cables and additionally installed antennas. That was a costly additional effort." An effort that is now a thing of the past.

Battery as a Service: From vision to implementation

Advantages of our M2M SIM cards for alarm systems:

  • No matter where, everywhere access to the strongest mobile network on site
  • Always the right SIM card, regardless of location
  • Secure remote access with static private IPs via VPN tunnel
  • Limitation to VdS-certified networks (Telekom & Vodafone)
  • Common data pool for all active M2M SIM cards
  • Simple SIM management of all active M2M SIMs in the online portal or vie API in your own system
Battery as a Service: From vision to implementation

One SIM - always the best connection

With the M2M SIM cards from wherever SIM , Büttner relies on a single M2M solution that enables its security systems to connect to multiple networks throughout Germany and Europe. If a mobile network fails, a system can simply connect to the next network thanks to the SIM. This way, the connection remains stable and the risk of a disconnection is minimised.

Which network the device connects to depends solely on the available network strength. The M2M SIM cards from wherever SIM do not favour any particular network operator. Unlike the M2M SIM cards from network operators, they do not tell a device which network it must connect to.

Mobile radio as a backup

"Since the switch from ISDN to IP, it has become even more important that we have a functioning mobile connection. In the event of a power failure, the Internet router is no longer supplied with power and the primary connection path is interrupted. In this case, the mobile network must be available as a backup, otherwise we lose the connection to the system. By using wherever SIM , we have virtually eliminated this risk."

Another advantage for Büttner: the clear online portal. "Another plus of wherever SIM is the customer portal. We can see our SIM cards in use at a glance and can easily evaluate all data. That reduces the administrative workload considerably once again."

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